EncodingDetector

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Guesses the encoding of an array of bytes in an unknown encoding

http://icu-project.org/apiref/icu4c/ucsdet_8h.html

Interface Synopsis

class EncodingDetector {...}

Public Methods

• ->__construct(): void
  Creates an encoding detector

• ->detect(): EncodingMatch
  Returns an EncodingMatch object containing the best guess for the encoding of the byte array

• ->detectAll(): varray<EncodingMatch>
  Returns an array of EncodingMatch objects containing all guesses for the encoding of the byte array

• ->setDeclaredEncoding(string $encoding): void
  If the user provided an encoding in metadata (like an HTTP or XML declaration), this can be used as an additional hint to the detector

• ->setText(string $text): void
  Sets the input byte array whose encoding is to be guessed